Syringe



Sept. 15, 1925,- r G, N. HEIN SYRINGEv Filed Aus 50- 1924 Zfy (lflornay PATENI orifice.l

GEORGE N. HEIN, or sAN FRANCISCO, CALIFORNIA.

SYRINGE.

Appucauqn sled August 3o, 1s24.- serial No. 735,126. l

` T aZZ whom it ma concern Be it-known t at I, GEORGE HEIN, a citizen of the' United States, residing in the city and county of San Francisco and State .of California, have invented certain new` .said shell. Upwardly ffrom the base 4 in the and *useful Improvements in Syringes, of which the following is a specification.

The present invention relates to improvements in medical appliances, more 4particularly syringes, and the invention has for one of its objects to provide a syringe in the use -of which the operator has `complete power control from the minimum to the maximum requirements for injecting fluids, gases .and medicated solutions into various cavities and tissues of the body, or withdrawing matter from cavities or in pumping out the st'omachfpleural, or abdominal cavities, and ,the elimination of matter from all sinuses, vizz-antra and frontal, and deep, obscure', and superficial abscesses.

A further object of theinvention is to design a syringe adaptedespecially for inject ing large quantitiesl of solutions int-ravenously, such. as salvarsan, and numerous intravenous products, where a greater'dilution `of the solution is preferable` to the strength of concentrated form injected under present conditions. I

A further object is to provide an appara tus whereby the operator is enabled to inject directly into the tlssues any desired strength4 of solution contained within an ampul di-v rec'tly therefrom without transferring the solution to a separate container.

IVith the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanyingA drawings, and set forthin the claim hereto appended, it beingunderstood that various changes in the form,proportion,

size and minor details of construction within the scope of the claim may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings disclosing the invention Fig. 1 is a view in plan of the preferred embodiment thereof. j

Fig. 2 is a similar view ofa modified construction, 4

Fig?)V is a'viewin elevation of an ampul with the end portions to be broken off indicated by transverse designations.

In the drawings, wherein like characters tween the ampuland-tube. 1

of reference designate corresponding parts, 1 indicates a cylindrical shell adapted to be closed by a c o/ver resting on the peripheral edge of the circumferential wall .3 of the shell disposed at right angles to the base 4 of pression rollers 10, the surface of each of which lies in slight spaced relation to the inner face of the wall 3 of the shelll.

At diametrically opposite sides, the wall 3 is formed with pairs of tubular passages 1l through which extends lengths of readily compressible elastic tubing 12 and 12. The respective Ystretches of tubing4 within the shell 1 following the contour of the inner surface of the wall 3 and lying eXteriorly of the tube compression rollersv 10. The elastic tube 12 at its inlet end mounts a two way valve controlled casing 13 wit/h which connects the outlet of rit-container 14 for holding a body Vof liquid, for example normal salt solution, which it is desired to intermix with the main body of medicine or solution employed as an injection. W-'ith the valve casing 13 also connects a pipe 15 mounting at its end an ampul 16py 'lhe ampul-is preferably of glass construction, and provided with sealed ends 17 and 17 ,the portion of the ampul end adjacent the seal portion 17 being bulged or rounded as at 18. `The end portion 17Aof the ampul is broken off on the line indicated and the `endofl the flexible ytube is inserted to overlie the portion 18, the

bulge serving as a' uniting connection be-' Prior to operation, the upper end 17v of the ampul is broken on-the line'indicated to admit air and 4permit the flow of the contents from the 'opposite endthereof The elastic tubing sections 12 and 12 are interconnected in a two-way-valve casing 19, and

from the casing extend the nipples 20 and v 21, the former connecting through a flexible tube 22 with the usual form of hypodermlc needle'23, the tube mounting` a glass obserl vation section 24, which facilitates the operation of the apparatus. The latter nipp e 21 connects with a drain tube 25, and the op osite end of the tube l2 terminates in a rain outlet 26. It will be observed that when the device is in use the sections of elastic tubing within the shell l are advancingly compressed by vthe travel of the com theelastic tubes 12 and 12 it is possible to inject the solution and to drain from the diseased area at one operation. It is also possible Without the aid of check valves' to force a continuous stream of fluid into the desired area. The employment of elastic tubing relieves the shock of the pressure of the fluid as injected into the diseased area, as the elasticity of the tubes is capable of absorbing the pulsations of the heart when the. injection is made into the arteries.

In the modified construction, I have eliminated the drain pipe 12 and have constructed the compression roll apparatus with but one roller 10.

It will be observed that the first ampul has two breakable ends 17 and 17', and that the enlargement 18 inwardly from the end y A 'hypodermic syringe including a source of medicinal solution, a hypodermic needle for connection with an area to be treated, an

elastic tube connecting the same and through which the solution is conveyed under pressure to the needle, a second tube constituting a drain, and connecting at one end with the area treated, and at its opposite end discharging to the atmosphere, a casing throughl which the tubes pass and provided with a Wall against the inner face of which said tubes lie in opposing relation, and a member rotatably mounted within the casing for advancingly compressing the tubes against the wall for continuously conveying the so- -lution in opposite directions through the respective tubes.

In testimony whereof I have signed my' name to this specification.

' GEORGE N. HEIN. 

